

#print("你好，世界")
#print(1+1+2)

'''
a = 10
b = 20
c = 0.5
print(a)
print(b)
print(c)
print(type(a))  #打印出类型
print(type(c))  #打印出类型
'''

'''
"  '  都可以表示字符串

a = "hello"
b = 'world'
print(a+b)  #两个字符串相加
print(type(a))
'''

'''
a = True
b = False
print(type(b))
print(type(b))
'''

'''
动态类型特征
a = 10
print(type(a))
a = 'hello'
print(type(a))
'''

"""
a = 10
print(f'a = {a}')

b = input('请输入')    # ' " 效果一样
print(f'输入的值={b}')  # ' " 效果一样
"""

"""
a = input("请输入第一个整数")
b = input("请输入第二个整数")

a = int(a)  #如果不转成 int  a+b = 1020
b = int(b)
print(f'a + b = {a+b}')
"""

'''
print(1/3)  #相除
print(8%3)  #求余
print(2**3) #乘方
print(9**0.5)
print(7//2)     #取整除法  7/2 = 3.5  向下取整  3
print(-7//2)    #取整除法  -7/2 = -3.5  向下取整  -4
'''











